The nature of statistics and probability

Subjects are selected by dividing up the population into subgroups, and subjects are randomly selected within subgroups.

Subjects are selected by using an intact group that is representative of the population.

Qualitative variables are variables that have distinct categories according to some characteristics or attribute.

Subjects are selected by random numbers.

What are the four measurement scales of the data

In a large school district, a researcher numbers all teachers and then randomly selects 30 teachers to be interviewed.

What are the two branches of statistics?

... classifies data into categories that can be ranked; however, precise differences between the ranks do not exist.

The colors of baseball hats sold in a store for a specific year is an example of

Continuous variables assume values that can be counted.